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only use getrlimit/setrlimit syscalls if they exist

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riscv32 and future architectures only provide prlimit64.
This commit is contained in:
Stefan O'Rear 2020-09-03 03:31:05 -04:00 • committed by Rich Felker
parent 8910efd0e4
commit 41149ea8c7
2 changed files with 11 additions and 1 deletions
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6
src/misc/getrlimit.c
View file

@ -6,12 +6,13 @@
int getrlimit(int resource, struct rlimit *rlim)
{
unsigned long k_rlim[2];
int ret = syscall(SYS_prlimit64, 0, resource, 0, rlim);
if (!ret) {
FIX(rlim->rlim_cur);
FIX(rlim->rlim_max);
}
#ifdef SYS_getrlimit
unsigned long k_rlim[2];
if (!ret || errno != ENOSYS)
return ret;
if (syscall(SYS_getrlimit, resource, k_rlim) < 0)
@ -21,6 +22,9 @@ int getrlimit(int resource, struct rlimit *rlim)
FIX(rlim->rlim_cur);
FIX(rlim->rlim_max);
return 0;
#else
return ret;
#endif
}
weak_alias(getrlimit, getrlimit64);

6
src/misc/setrlimit.c
View file

@ -12,12 +12,14 @@ struct ctx {
int err;
};
#ifdef SYS_setrlimit
static void do_setrlimit(void *p)
{
struct ctx *c = p;
if (c->err>0) return;
c->err = -__syscall(SYS_setrlimit, c->res, c->lim);
}
#endif
int setrlimit(int resource, const struct rlimit *rlim)
{
@ -29,6 +31,7 @@ int setrlimit(int resource, const struct rlimit *rlim)
rlim = &tmp;
}
int ret = __syscall(SYS_prlimit64, 0, resource, rlim, 0);
#ifdef SYS_setrlimit
if (ret != -ENOSYS) return __syscall_ret(ret);
struct ctx c = {
@ -42,6 +45,9 @@ int setrlimit(int resource, const struct rlimit *rlim)
return -1;
}
return 0;
#else
return __syscall_ret(ret);
#endif
}
weak_alias(setrlimit, setrlimit64);